Engine



1944- LA VERNE B. RAGSDALE 2,364,658

ENGINE Filed Aug. 5, 1942 3 Sheets-Sheet' 1 INVENTOR 1a eaqfie z. fags-4 24;.

Dec. 12, 1944.

LA VERNE B. RAGSDALE ENGINE Filed Aug. 5, 1942 INVENTOR 3 Sheets-Sheet 2 Dec. 12, 1944. LA VERNE B. RAGSDALE.

3 Sheet ed Aug. 5, 1942 INVENTOR /d%;;77e 5 ia sd'a/e.

Patented Dec. 12, 1944' 2,884,6t8 moms in verse a Male, Detroit. men, allignor to Manufacturing Company, Detroit,

Mich, a corporation of Michigan Application August 5, 1942, Serial No. 458,888 80 Claims. (a. 123-80) This invention relates to internal combustion engines and. particularly to engines or the type having a rotatable valve in the head thereof.

The present invention has particular application to an internal combustion engine or the kind in which the rotatable valve in the head, preferably although not necessarily of the kind which rotates continuously in one direction, is formed with substantially all or at least the major portion. of the combustion chamber and is generally 10 conical or irusto-conical in shape.

In the preferred embodiment of the invention the combustion chamber in the valve has an opening or port in the side 01' the valve adapted to communicate with an intake or exhaust passage, or both as the case may be, and also an opening at the inner end or bottom of the valve leading to the cylinder. With the exception of the ports in the side and bottom of the rotor which a 'ford communication between the combustion 50 chamber, cylinder and intake or exhaust passage Y or passages, the combustion chamber is otherwise entirely enclosed or housed within the valve member or rotor. The combustible charge within the combustion chamber is tired preferably by 2 spark ignition although in its broader aspects the invention is not considered to be so limited.

Heretofore, in the development of engines or the rotatable valve type, it has been considered desirable to use a valve of the irusto-conical type with the large end of the valve adjacent to and facing the outer end of the cylinder, this construction having the advantage of permitting the valve driving and supporting mechanism to be operatively connected to the valve stem extending 5 from the smaller end of the valve.

In many Previous structures the bottom or the alve or rotor facing the outer open end of the cylinder has been made with a diameter at least as great or greater than the diameter of the cyi- 40 inder bore and substantially the entire bottom surface of the valve niember around the opening into the cylinder has been exposed to the full explosion force or pressure. Serious difllculties and problems have been encountered in obtaining sustained emcient operation of an engine of commercial size constructed in this manner. Thus, there has been encountered such Problems as that of lubricating the rotary valve. the problem of providing adequate and sumcient bearings for the valve in order to prevent seizing, scoring and undue friction during operation. and the problem of sealing the combustion chamber against leakageoi gases and consequent power loss during the power and compression strokes of the piston. It

The foregoing problems have been rendered dimcult 0! solution because of variations in pressures or forces acting upon the valve during the engine cycle. One major diiiiculty has arisen by reason oi the eil'ect of the explosion force or pressure in driving the cone-type valve member not only outwardly but also late a thereby causing a. severe wedging action or thrust oi the valve against its seat and tending to seriously impair the oil film between the surfaces of the valve and its bearing seat in the cylinder head, resulting in seizing and scoring of the valve member. d

An object of the present invention is to improve the construction of the engine so that even longer sustained periods of operation may be achieved and in which the rotor may be balanced within its cavity in the cylinder head more effectively and to better advantage, thereby eil'ecting. still greater improvements in operation not only by increasing the power output and the life of the valve but also decreasing oil consumption.

A further object or the invention is to provide an improved internal combustion engine oi the type utilizing a frusto-conical valve containing the major portion of the combustion space and in which the position of the rotor within the cylinder head is more eflectively controlled, thereby avoiding scoring and seizing of the valve, and in which the power output is increased by reducing leakage of gases around the intake and exhaust ports.

Still another object of the invention is to simplify the bearing for the valve or rotor within the cylinder head, eliminating complicated thrust bearing arrangements, complicated adjustment devices therefor, reducing weight, saving space, increasing the performance life of the engine, and permitting the use or less expensive metals in the fabrication of the rotor valve and the cylinder head.

A further object of the invention is to increase the performance his or the valve and improve the operation thereof by providing in eii'ect a double valve or rotor construction, the inner valve member containing the combustion chamber and being generally frusto-conical with its narrow end adjacent the cylinder, and the outer valve member being generally frusto-conical with its wide end adjacent the inner valve member, the two valve members being drivingly connected and having tapered bearing races coacting with bearing surfaces in the cylinder head, provision being made to urge the valve members apart by pressure introduced therebetween from the combustion chamber at the time of explosion.

Still another object of the invention is to provide an engine having a double rotatable valve, preferably oi the generally irusto-conical type, which in eflect comprises two valve members drivingly interconnected, pressure or other means being provided to urge the members apart against their respective bearing surfaces at the time of explosion.

Other objects oi this invention will appear in the following description and appended claims, reference being had to the accompanying drawings forming a part or this specification wherein like reference characters designate corresponding parts in the several views.

Fig. 1 is a fragmentary sectional elevation illustrating a portion of a multi-cylinder engine embodying the present invention.

Fig. 2 is an enlarged fragmentary sectional elevation illustrating particularly the associated cylinder head and rotary valve structure shown in Fig. l.

Fig. 3 is an enlarged section taken substantially through lines 3-4 Fig. 1 looking in the direction of the arrows.

Fig. 4 is a plan view of the intermediate cylinder head member looking towards the cylinder and with the rotary valve removed.

Bei'ore explaining in detail the present inven tlon it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings, since the invention is capable of other embodiments ing practiced or carried out in various ways. Also it is to be understood that the phraseology or terminology employed herein is for the purpose oi description and not of limitation.

In the drawings there is illustrated, by way of example, one embodiment of the invention as applied to an internal combustion engine oi spark ignition type designed particularly for the power plant oi an aircraft. The invention may obviously be embodied in engines for other purposes, such as automotive, marine and industrial engines. For most uses the engine is of the multi-cylinder type, although any number 0! cylinder units may be employed in any given engine. In the present embodiment, for the purposes ot simplicity, a single cylinder unit of the engine is illustrated, it being understood that the remaining cylinders of the engine are identical to the structure herein shown and described.

Referring to Fig. l, the present engine comprises a suitable crankcase 20 within which is mounted a crankshaft 2i supported in bearings according to conventional practice. A cylinder 22 is secured rigidly to the crankcase and has its lower or inner end projecting thereinto. Mounted to reciprocate within the cylinder is a piston 22 adapted to be connected in the usual manner by a connecting rod 2 to the crankshaft 2|.

In the present engine the valve rotor comprises two valve parts, namely, a lower or inner valve member 2! and an upper or outer valve member 2|, these valve members being drivingly con nected together with pressure means being provided for the purpose of urging the members apart at the time or explosion, as hereinafter described. The combustion chamber of the cylinder is formed principally within the inner rotary member 25, this member comprising a frusto-conlcal body arranged immediately above the piston 23 when at the top oi its strok T and of bef vided with an annular groove or channel rotor 25 iits within a correspondingly shaped substantially irusto-conical cavity 21 in an intermediate cylinder head member 28. It will be seen that the irusto-conical valve body 25 is inverted so that the narrow end thereof is adjacent the outer end of the cylinder 22 and the outer wide end 01 the valve body laces the outer valve member 26. The valve member 28 is also oi generally irusto-conical shape fitting within a correspondingly shaped cavity 2! in an outer cylinder head member 30. The bottom or wider and oi! the valve member 28 corresponds in diameter to the top or wider end of the valve member 25. Thus, the tapering side wall of the valve member 25 bears against the cavity 21 having a downwardly and inwardly tapering wall, whereas the correspondingly tapered walls of the upper valve member 28 and the cavity 20 extend downwardly and outwardly.

The cylinder head member 28 has an annular portion 2811 which overlaps the upper end oi the cylinder 22 and is attached thereto by threads 2 l. The upper cylinder head 30 is rigidly secured to the cylinder head member 20 by bolts 32.

The present engine is illustrated as being aircooled and, accordingly, the cylinder 22 is provided with projecting fins are also provided on the intermediate cylinder head member 28. It will be understood that the present invention is not limited to an air-cooled engine as it will be apparent that any effective cooling system may be utilized.

The rotary valve member 25 is formed with a curved wall chamber 35 which constitutes substantially the entire combustion space when the piston 23 is in the position of maximum compression as illustrated in Fig. 2. The chamber ll is provided at one side with a port 20 and at its inner end with a centrally located port or opening 31 leading into the cylinder 22. The port 86 in the side wall of the valve member 25 is adapted to register successively with an intake passage 32, a spark plug at threaded opening 89, and an exhaust passage positions in the cylinder head member 28. The intake passage N in the cylinder head is connected to an intake conduit ll which is attached to the cylinder head by screws H. The exhaust passage 40 in the cylinder head communicates with an exhaust conduit is attached to the cylinder head by screws 14. The valve member 2! is chambered to provide a cavity 46 extending entirely around the combustion chamber, II and in preferred practice this cooling chamber is filled, or partially so, with a suitable heat conducting medium such as metallic sodium. The upper end of the 25 has a threaded hole adapted to be closed by means oi a hollow plug 46. This plug has an annular wall l'l provided with threads n tor attachment to the valve member and has at its top an upwardly extending hollow embossment l9.

The top wall pro- I! which forms a vertical annular flange ii and this flange is provided with external teeth or Billin -3 M which cooperate with similar teeth or splines til on a depending annular flange ll integra! with the outer valve member 26. The flange 54 extends into the recess 50, as illustrated in Fig. 2. and since the teeth or splines 52 and 53 are in mesh at all times it will be seen that the valve members 2! and 26 are thereby drivingly connected together. The valve member 26 is recessed at I! adjacent the flange Il so of the valve member 25 is 28. Cooling fins 3M as to provide clearance for the plugv 45. The recess ill in the top of the valve member 25 forms an annular flange 55 which fits against and within an annular wall 51 of the upper valve member 25. he flange 56 is grooved to receive expansion rings 55 which engage the surface of the wall portion 51 and provide a seal against any leakage of gases past the rings 55 into the space above these rings between the valve members 25 and 2B.

outwardly of the expansion sealing rings 55 the valve member 25 has an annular inclined top surface 59 which is juxtaposed to a correspondingly shaped bottom surface 55 of the valve member 28. These surfaces 59 and 55 have an operating or runnin clearance therebetween and are normally out oi itact during operation of the engine. A small duct or passage 6| extends from the combustion chamber 35 through the top wall of the valve member 25 into the space between thesurfaces 59 and 55. In the present instance one connecting duct is provided between the combustion chamber and the space between the surfaces 59 and 55 of the valve members. However, a plurality of ducts may be prcvided as may be desired. The size or diameter of this duct BI is predetermined so that at the time 01' firing the proper amount of pressure will be transmitted from the combustion chamber to the space between the surfaces 55 and ,55, thereby exerting a force tending to separate or spread the valve members apart.

The upper or outer valve member 25 is formed with an integrally projecting stem 52 which has a central hole 53 therethrough to receive a compression spring 54. This spring is of suitable strengthand is held under the' proper degree of compression by means of a nut 55 which is threaded into a tapped counterbore of the hole or bore 63. Thus, the spring 54 is at all times loaded and exerts a. calculated or predetermined downward force against the embossment 49, thereby tendlog to force the valve member 25 downwardlyagainst the downwardly converging wall of the valve cavity 21.

The rotary valve, comprising the connected members 25 and 25. is driven through the medium of the stem 52 which is positively connected to a driving gear in such manner as to permit slight relative axial movement between the driving gear and the rotor 25, 25. It will be understood,of course, that thedriving connection 52, 55 between the valve members 25 and 25 is such as to permit slight relative axial movement but not relative circumferential movement between these parts. The stem 52 of the rotor is provided with external longitudinal splines 55. The rotor is driven by a gear 51 having suitable gear teeth 55, this gear being formed with a depending cylindrical hub or sleeve 55 having a sliding fit over the stem 52 androtatable within a bearing bush! ing I55. The gear "also has internal tooth-like splines III. A coupling member H iitswithin the annular space formed between the teeth or splines of the driving gear, this coupling memher having exterior teeth or splines I2 fitting into the spaces between thesplines 15 of the driving gear and also having internal splines 12 fitting within the spaces formed by the splines" of the stem 52. Interposed between the head of the clamping nut 55 and the gear 51 is a spr ng washer II which has a central aperture through which the shank of the clamping nut projects, the washer being of sufllcient diameter to engage the upper face of the gear and thus yioldingly hold the gear and member H in driving positions.

Referring to Fig. 1, the gear 51, which is attachedto the projecting stem 5201' the rotor member 25, is driven through the medium of a gear 15 attached to a top horizontal shaft 15. This shaft is of the desired length to permit simultaneous driving of the rotors of a plurality of cylinders arranged in line, or arranged in V- formstion. Attached to the end of the shaft I5 is a gear 11 which is driven by a sear ll secured to the upper end of a tower shaft 15 suitably mounted to extend through a vertical housing 85. Secured to the lower end of the tower shaft 15 is a gear 5! which is driven through the medium of a gear 82 attached to the crankshaft 2|. From the foregoing it will be seen that the rotary valve in the present engine comprises two generally irusto-conical members connected together for rotation as a single unit while permitting a slight amount of relative axial movement. It will be understood that during rotation of the valve member the fuel mixture or charge will be taken into the cylinder when the port 36 registers with intake passage 35. Firing of the charge will occur whenthe valve port reaches the spark plug location 55, the charge at this time being compressed substantially entirely within the chamber 55 with the piston in its position of maximum compression as illustrated in Fig. 2.

As the explosion occurs in the combustion chamber 35 and the burning of the fuel mixture proceeds, the resultant of the forces acting on the valve member 25 is a force acting or tending to dlsplace the valve outwardly away from the cylinder. Since the valve members 25 and 25 are fitted within the cavities 21 and 25 with suitable operating clearances the normal eil'ect of the explosion pressure is to force the members 25 and 26 outwardly, thereby causing member 25 to move away from the walls of the cavity 21. This normally would produce excessive clearance and destroy the seal between the valve member 25 and the cavity' walls 21, and permit leakage of gases through passages 38 and with consequent loss of power. Y

The foregoing, however, is obviated by providing the double cone valve and bleeding. the pres. sure from the combustion chamber through duct Bi into the space between the juxtaposed surfaces 59 and 50. A downward force is thus applied to the valve member 25oflsetting and substantially neutralizing the outward force tending to unseat the valve member 25. At the same time an outward force is exerted upon wall urging valve member 25 firmly against its conical or tapered bearing wall 25 thereby maintaining intact the oil film between these surfaces.

Since the opposed forces acting in a generally axial direction on valve member 25, due to explosion pressures, are substantially balanced, it will be seen that the valve member can substantially float within its cavity. However, proper sealing contact between the surfaces of member 25 and cavity 21 is maintained by the pressure a of spring 5| acting against the valve member to keep it seated. The expanslble sealing rings 55 seal on the spaces 55 and 55 from the bleed passage 5! while permitting the pressure introduced between valve members 25 and 25 through passage "to urge the valve members apart.

I claim:

1. In an internal combustion engine having a cylinder head, a rotatable valve in said head com- 3. In an internal combustion engine having a cylinder and a reciprocable piston therein, a cylinder head, a two part rotatable valve in said head, one part having a combustion chamber, and a communicating duct leading from said combustion chamber to the space between adjacent walls of the two parts 01 the valve.

4. In an internal combustion engine having a cylinder and a reciprocable piston therein, a cylinder head, a two part rotatable cone-type valve in said head, one part having a combustion chamber and a port opening axially into the cylinder, and a communicating duct leading from said combustion chamber to the spacebetween adjacent walls of the two parts oi the valve. r

5. In an internal combustion engine having a cylinder and a cylinder head, a rotary valve comprising inner and outer valve members, the inner member having walls converging toward the cylinder and provided with a combustion chamber opening into the cylinder, and a duct eflecting communication between said chamber and the space between said members.

6. In an internal combustion engine having a cylinder and a cylinder head, a rotary valve comprising lnner and outer valve members, the inner member having walls converging toward the cylinder and provided with a combustion cham-v ber opening into the cylinder, means for drivingly connecting said members together while permitting'relative axial movement thereof, and a V duct efl'ecting communication between said chamber and the space between said members.

'7. In an internal combustion-engine having a cylinder and a cylinder head, a rotary valve comprising inner and outer valve members, the inner member having walls converging toward the cylinder and provided with a combustion chamber opening into the cylinder, a duct eflecting communication between said chamber and the space between said members, and yielding means'ior urging the inner valve member toward the cylinder independently of the outer member.

8. In an internal combustion engine havin a cylinder and a cylinder head, a rotary valve comprising inner and outer valve members, the inner member having walls converging toward the cylinder and provided with a combustion chamher opening into the cylinder, means for driviriglyi connecting aid members together while permitting relative axial movement thereof. a duct eflecting communication between said chamber and the space between said members, and yieldinl means for the inner valve member toward the cylinder the outer member. ,amanintsrualccmbultlonenginchavinla cylinder and a cylinder head, rotary valve com prisi l inner and outer valve chamber and the space be inde endently or rotatable valve in said head comsaid outer valve member.

. prising inner and outer valve members,

10'. In an internalcombustion engine having a cylinder and a cylinder head, a rotary valve comthe inner member having walls converging toward the cylinder and provided with a combustion chamher opening into the cylinder,'the outer member having walls diverging toward the cylinder, means for vingly connecting said members together while permitting relative axial movement thereof, means 101' transmitting pressure from the combustion chamber to the bottom of said outer valve member, and yielding means for urging the inner valve member toward the cylinder independently of the outer member.

11. In an internal combustion engine having a cylinder, 2. pair of drivingly connected generally frusto-conical rotary valve members mounted for relative axial movement arranged face to face but reversely with respect to each other, one

member having a combustion space, and'means for transmitting pressure from said space to the adiacent'face or the other member.

12. In an internal combustion engine having a cylinder, a rotatable valve having a combustion chamber ope into the cylinder and being generally frusto-conical with its sides converging toward the cylinder, a valve movably axially with respect thereto, and means for introducing pressure from the combustion chamber to the space between said valve and driving member. f a

13. In an internal combustion engine having a cylinder, a rotatable valve having a combustion chamber openingintc the cylinder and being generally irusto-conical with its sides converging toward the cylinder, urging said valve toward the cylinder, a driving member for said valve movably axially with respect thereto, and means for introducing pressure from the combustion chamber'to the space between said valve and driving member.

14. In an internal combustion engine a cylinder, a rotatable valve having a combustion chamber opening into the cylinder and being generally irusto-conical with its sides convergins toward the cylinder, a generally frustoconical driving member for said valve movable axially with respect thereto, and means for introducing pressure from the combustion chamber to the space between said valve and driving member.

15. In an internal combustion engine having a cylinder and a cylinder head, a valve member having tapering side 'walls converging toward the cylinder and rotatable within a seat formed by a cor ly shaped cavity in said head. said member having a combustion chamber openin: into the cylinder, a valve driving member positioned at the biiter end of the valve and having taperinl side walls diverging toward the cylinder and rotatable within a correspondingly shaped cavity in said head. said members having iuxtaposed races, in pressure passage leading from the combustion chamber to the space between said races, and means for drivingiy condriving member for said yielding means for having having tape between eaid' suriwcsv the drlvindy r emc e. members while permitting relative .nc'oting said axialmovementthemoi.

1am an. internal-wmbustion engine having a cylinder and a cylinder head, a valve member havina' tapering side walls ccnversins toward the from the combustion chamber to' the space between said mes, means or drivlngly connecting said members while permitting jrelative axialmovement thereof, and means connected to said valve driving member for rotating the some while permitting relative axial movement or said mom-- her and 17. In an internal combustion engine having a cylinder and a cylinder head, a valvemember having tapering side walls converging toward the cylinder androtatable within'a seat iormed by a correspondinzlyshapedcavity in said head. said member having a combustionbhamber open-.

ing axially into the cylinder, a valve driving member. positioned at the outer end of the valve and having tapering side walls diversins toward the shaped cavity in said head, said members having Jwrtaposed marginal faces, a pressure pas.- sage leading trom the combustion chamber to the space between said races. and means located in 7 30 cylinder and rotatable a. correspondingly wardly oi'said faces for drivln'gly connecting said l ment thereof.

18. In an internal cylinder and awcylinder head, a valvemember I ring side walls eonvergingJ-toward the; cylinder and rotatable within a seat'tormed by a correspondingly shaped cavity in said head. said member having a combustion chamber opening into the cylinder, a valve driving member posl-.

tioned at the outer end of the .valve and havin taper ng side walls diverging toward the cylinder and rotatable withlna correspondingly shaped.

' cavity in said head, said members having juxtaposed faces, a pressure passase'leading from-the I combustion to the space between -said races, means {or drivingly connecting said mem here while permitting relativeaxial'movement thereof, and yielding means urging said valve member-toward its seat and relatively to said member; 19. In an internal 0O drivins y connected weather-sue axially movable 5 with-respect to each other, means-ior urging the inner mcmbertoward the cylinder.'and ior urging the other member away from cylin' der, one member havins acombusticn municatirig by means or a port with thefeylin'der.

internal combustion wacylinder and! cylinder head, a two'part rotatable valvs in said 7 head, one perthavlnga' combustion and said partehs mr opposediaces extciidiflscloeely etemendsseer combdstion engine; "havln's' a; cylinder. 2. pair of rotatable generally irusto- I nieally shaped inner and oliter valve members members while permitting relative axial movecombustion engine having al J 6.1a an internal wombmtlon'snsinehsvins and alcylinder head, a. rotary valve comprising outer valve members. the" inn er member" walls the cylinder amt ov d d with a om s ion-'= chamber opening into-the oylinder,;the outer Ia cylinder.

21. in an internal combustion e rine having -a cylinder head. a-rotatable valve in said .head

ccmprlrin's two members 'drivinsly connected tose her and separablein a directlon axially'oi the valve, one or saiii'membcra having a combustion chamber andv a duct eflectln'g. communication between'said chamber and the space between willacent surfaces oi said members; theother member-having a-stem. and a scar nected to said stem. 1

comprising two members drivind'ly connected together and separable in a direction axially oi the valve, one of said members having a combustion chamber and a duct efl eoting'communicatlonbetween said chamber and'the space 'between said membera'the; other member havingfla hollow stem, a gear-rdrivinsly connected to ea'id stem," and a compression spring within said'stem coacting with the first named members '1 as. In an internal combustion engine navinej a cylinder and a reclprocablepis'ton' therein. a

' cylinder head, a. two part rotatable valve in said.

head. one part having a combustion chamber. a

communicating duct leading-from said oor'nbnh' tion chamber "to the'epa'ce hetweenndiaoent walls of the two parts oi'the valve. the'othe'r part'haw; ing' a, hollow axially extending stem, 'jdrlving means connected to said stem. and a compres slonspring'in said stein coactingwith the first namedvalve Dart;

24:1:1 an internal combustion ensln'e-having ri acylin'der head, a rotatable valve in said head comprising two members; d vingly connected to-' gether and separable in a direction'axially oi the" valve, one oi paid members havingabombustion chamber and a duct effecting communication between said chamber and the space between said members,- the other member having a hollow stem, a gendrivin'glvconnected'to said sca ar and a. compression spring within said stem coast ing with the first named member; r

25. In an internal combustion engine inner member having walls convergingtcward the cylinder andprovlded with' a combustion chamber openingfinto the cylinder, means or ,dzivinsly connectins said members togetherwhile permitting relative azial'movement thereof,-

., a duct effecting communication between said chamber and the space betweem'eaid members;

the outer member a licllows'tem. anda' prlnlwithin member having walls diversins toward the cylin- {1611mm io'r cennectingsaidimemortrsnsmi tromthe. combustion Y ca adiacent each a'ccmmunicatins duct lead-1.;

'mgrromcaldcombusticnchambertofispace fins,

i re ative axial moi carer-waive member. esteem;

drivinalv con- 22. In an internal; combustion engine havllld a cylinder head. a rotatable valve in said-.headhavin a cylinderand a cylinder head. a rotary'v'alve comprising inner and outer valve members;

said'stem enacting wit-droid nsuoqcee'mg andsgjkwithinq bustion chamber, a screw plug closingthe outer able valve formed with a combustion chamber end oi the chamber. a dri member for said having the senior-portion thereof'in the valve valve, and a spring interposed between the drivand lyins at one side of the axis of rotation, a ing member and said plus. a member drivinsly connected to said valve, and a 28. In an internal combustion engine having 5 duct for transmitting pressure irom the combusa cylinder. a rotatable valve having a combustion tlon chamber to said member and locate chamber and side walls converging toward the ai'oresaid side oi. the said axis.

cylinder, said valve being double-walled to pro- 30. In an internal eombustion engine, a rotatvide a chamber extending around said combusable valve formed with a combustion chamber tion chamber. a screw plug closing the outer end 10 and a port in the side 0! the valve at one side of of the chamber. a driving member for said valve its axis of rotation communicating with said having a. spiined connection with said valve outchamber. means ior driving said valve. and a wardly 01 said plug. means ior urging said drlvduct transmitting pressure trom the combustion ing member away from the valve. and means 101' chamber to said means and located at the stom urging the valve toward the cylinder. 15 said side oi said axis.

29. In an internal combustion engine, a rotat- Y LA VERNE B. RAGSDALE.

cnn'nr ics'm or CORRECTION. A Patent 11 2,364,658; Deeusber 12, 191th.

' a in mm B. BAGSDAIE.' It inner-eh certified that error appears in the printed specification of the above numbered patent requiring correction ss'follovls: i 'ageli, first column, Line 1 oleim 2, after ihe syllable "tween" strike out the words walls of and insert the seme b'efore "said" first occurrence in line 11+,

1 some 01m; and that the said Letters Patent/mounts road with his oerrecti on therein th t the some may conform to themeeord or the es's'e in the Patent Officer I v 7 Signed-and sealed this so: an or m A. n. 19b5,

'Leqli'e Frazer I (Sea Acting Commissioner of Patents.

bustion chamber, a screw plug closingthe outer able valve formed with a combustion chamber end oi the chamber. a dri member for said having the senior-portion thereof'in the valve valve, and a spring interposed between the drivand lyins at one side of the axis of rotation, a ing member and said plus. a member drivinsly connected to said valve, and a 28. In an internal combustion engine having 5 duct for transmitting pressure irom the combusa cylinder. a rotatable valve having a combustion tlon chamber to said member and locate chamber and side walls converging toward the ai'oresaid side oi. the said axis.

cylinder, said valve being double-walled to pro- 30. In an internal eombustion engine, a rotatvide a chamber extending around said combusable valve formed with a combustion chamber tion chamber. a screw plug closing the outer end 10 and a port in the side 0! the valve at one side of of the chamber. a driving member for said valve its axis of rotation communicating with said having a. spiined connection with said valve outchamber. means ior driving said valve. and a wardly 01 said plug. means ior urging said drlvduct transmitting pressure trom the combustion ing member away from the valve. and means 101' chamber to said means and located at the stom urging the valve toward the cylinder. 15 said side oi said axis.

29. In an internal combustion engine, a rotat- Y LA VERNE B. RAGSDALE.

cnn'nr ics'm or CORRECTION. A Patent 11 2,364,658; Deeusber 12, 191th.

' a in mm B. BAGSDAIE.' It inner-eh certified that error appears in the printed specification of the above numbered patent requiring correction ss'follovls: i 'ageli, first column, Line 1 oleim 2, after ihe syllable "tween" strike out the words walls of and insert the seme b'efore "said" first occurrence in line 11+,

1 some 01m; and that the said Letters Patent/mounts road with his oerrecti on therein th t the some may conform to themeeord or the es's'e in the Patent Officer I v 7 Signed-and sealed this so: an or m A. n. 19b5,

'Leqli'e Frazer I (Sea Acting Commissioner of Patents. 

